* {
    margin: 0;
    padding: 0;
}

#app {
    font-size: 12px;
    line-height: 25px;
    border: 1px solid black;
    width: 320px;
}

#app ul {
    position: relative;
}

#app ul li {
    list-style: none;
}

.tipTitle, .tipBg {
    position: absolute;
    bottom: 60px;
    left: 0;
}

.tipTitle {
    z-index: 1;
    color: white;
}

.tipBg {
    width: 320px;
    height: 25px;
    background: #333333;
    /*opacity: 0.3;*/
}